Fireplace cross-circulating air heater



FIG. 1 is a top plan view of a fireplace cross-circulating _air heater showing my new design.

FIG. 2 is a left side elevational view, the right side being a mirror image thereof.

FIG. 3 is a front elevational view thereof.

FIG. 4 is a rear elevational view thereof.

FIG. 5 is a cross-sectional view taken along the line 5--5 of FIG. 3. 

The ornamental design for a fireplace cross-circulating air heater, substantially as shown and described. 